Solid-State Infrared Detectors.
Abstract
The design of and measurements on an optical point detector for 10.6-micromillimeter radiation with an information bandwidth of 100 MHz are reported. The detector consists of a photoconductive element mounted in the high-field region of a 10-GHz re-entrant cavity biased with a microwave field. The design of the experimental liquid-helium cryostat, of the cavity, and of the 10.6-micromillimeter optical source are given. The photoconductive gains of Ge(Hg) of GaP(Te), and of (Hg-Cd)Te were measured at a modulation frequency of 1 kHz. Analysis of the optical properties of a conical light pipe shows that it has an effective numerical aperture equal to the sine of the critical angle of the material of the pipe, and that its antenna pattern is equivalent to an inexpensive lens of the same numerical aperture. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1968
- Accession Number
- AD0845260
Entities
People
- Edwin K. Gatchell
- Henry S. Sommers Jr.
Organizations
- Sarnoff Corporation